Lieff Cabraser Heimann & Bernstein, LLP Announces Class Action Lawsuits Have Been Filed Against American Dental Part...( SAN FRANCISCO Calif. Feb. 15 /- T...),Health

SAN FRANCISCO, Calif., Feb. 15 /PRNewswire/ -- The law firm of Lieff Cabraser Heimann & Bernstein, LLP announces that class action lawsuits have been brought on behalf of purchasers of the securities of American Dental Partners, Inc. ("American Dental") (Nasdaq: ADPI) between August 10, 2005 and December 13, 2007, inclusive (the "Class Period").

If you purchased American Dental securities during the Class Period, you may move the Court for appointment as lead plaintiff by no later than March 31, 2008. A lead plaintiff is a representative party who acts on behalf of other class members in directing the litigation. Your share of any recovery in this action will not be affected by your decision of whether to seek appointment as lead plaintiff. You may retain Lieff Cabraser, or other attorneys, as your counsel in this action.

American Dental Partners shareholders that wish to learn more about this action and how to seek appointment as lead plaintiff should visit Lieff Cabraser's website http://www.lieffcabrasersecurities.com/cases/americandentalpartners.htm or contact Meagan Sullivan toll free at (800) 541-7358.

Background on American Dental Securities Class Litigation

The actions, pending in the United States District Court for the District of Massachusetts, were brought against American Dental and certain of its officers and directors for violations of the Securities Exchange Act of 1934. American Dental's primary business is providing administrative services to dental group practices in the United States.

The complaints in the above-mentioned actions allege that during the Class Period, defendants failed to
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